Container and refill container

Abstract

A container includes a replaceable bottomed cylindrical inner container, an outer container that houses the inner container, and a lid. The inner container is screw-mounted to the outer container. A locking piece that locks the outer container in the circumferential direction is provided in a cylindrical portion of the inner container. In a state in which the lid is mounted to the inner container, the lid suppresses movement of the locking piece in the radial direction.

Description

TECHNICAL FIELD

[0001] The present application relates to a container and a refill container. BACKGROUND

[0002] A container is known which includes an inner container that houses contents, and an outer container that houses the inner container, wherein the inner container is replaceable. In such a container, it is important that the inner container be smoothly detached from the outer container at the time of replacement, and on the other hand, during use of the contents, the inner container be fixed to the outer container, avoiding accidental detachment of the inner container and the outer container. Therefore, various studies have been made on the engagement mechanism of the inner container and the outer container.

[0003] For example, in Patent Literature 1, a structure is described in which, in a container provided with an inner container 1 and an outer container 4 that houses the inner container 1, elongated vertical elastic tabs 2a, 2a are provided on a flange 2 that is provided on the outer periphery of the lower end of the mouth of the inner container 1. In this structure, engagement protrusions 2c, 2c formed on the above-mentioned tabs 2a, 2a are engaged with engagement protrusions 5b, 5b of notches 5, respectively.

[0004] In addition, in Patent Literature 2, a dual container is described which is provided with a refill container (inner container) 30 that houses contents, and a wide-mouth container (outer container) 31 that houses the refill container 30 removably. Notch portions 37, 37 are formed on the opening edge of a mouth 33 of the wide-mouth container 31. The refill container 30 is provided with thick wall portions 44, 44 that enter the above-mentioned notch portions 37, 37. In addition, two convex portions 38, 39 are formed on the inner peripheral surface of the mouth 33 of the wide-mouth container 31. A convex strip 50 provided on the outer peripheral surface of the refill container 30 enters between the convex portions 38, 39.

[0005]

Prior Art Documents

[0006]

Patent Literature

[0007]

Patent Literature 1

[0008]

Patent Literature 2

[0009]

Problem to be Solved by the Invention

[0010] In Patent Literature 1, the inner container and the outer container are removable from each other by engagement of the engagement protrusions 2c, 2c and the engagement protrusions 5b, 5b, and in Patent Literature 2, the inner container and the outer container are removable from each other by engagement of the convex portions 38, 39 and the convex strip 50. However, because the engagement portions require a delicate dimensional structure, the material used is limited.

[0011] An object of one embodiment of the present application is to provide a container including an inner container and an outer container that houses the inner container, which can be configured without being limited by materials.

[0012] Means for solving the problem

[0013] One embodiment of the present application is a container including a replaceable bottomed cylindrical inner container, an outer container that houses the inner container, and a lid, the inner container is attached to the outer container by screwing, a locking piece that locks the outer container in the circumferential direction is provided in a cylindrical portion of the inner container, and movement of the locking piece in the radial direction is suppressed by the lid in a state where the lid is attached to the inner container.

[0014] Effects of the Invention

[0015] According to one embodiment of the present application, a container including an inner container and an outer container that houses the inner container can be configured without being limited by materials. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective view of a container (a container with a lid) based on the first embodiment.

[0017] Figure 2 is a view showing a state in which the container based on the first embodiment is disassembled.

[0018] Figure 3 is a perspective view of a state in which the lid is detached from the container based on the first embodiment.

[0019] Figure 4 is a cross-sectional view of line I-I of Figure 1

[0020] Figure 5A is a partial view of a cross section of line II-II of Figure 4

[0021] Figure 5B is a partial view of a cross section of line II-II of Figure 4

[0022] Figure 6 is a view for explaining the function of the locking piece.

[0023] Figure 7 is a perspective view of a refill container based on the first embodiment.

[0024] Figure 8 is a perspective view of a state in which the lid of the container based on the second embodiment is detached. ​​​

[0025] Figure 9 is a partial view of a cross section along a plane orthogonal to the axial direction of Figure 8

[0026] Figure 10 is a perspective view of a state in which the lid of the container based on the 3rd embodiment is detached. DETAILED DESCRIPTION

[0027] Hereinafter, a mode for carrying out the present application will be described with reference to the drawings, but the present application is not limited to the mode shown in the specification and the drawings.

[0028] <1st Embodiment>

[0029] The container based on the 1st embodiment of the present application is a double container with a lid, and has a replaceable bottomed cylindrical inner container, an outer container that houses the inner container, and a lid. Figure 1 is a perspective view of a state in which the constituent elements of the container 100 based on the present embodiment are combined, Figure 2 is an exploded view of the container 100. In addition, Figure 3 is a perspective view showing a state in which the lid 40 is detached from the container 100 based on the present embodiment, that is, a structure (double container) 1 composed of the inner container 10 and the outer container 20. Figure 4 is Figure 3 is a cross-sectional view along the I-I line of

[0030] As shown in Figures 1 to 3 ​As shown, the container 100 according to the present embodiment is a wide-mouthed container. Here, the so-called wide-mouthed container can be a container whose opening is wide enough to allow a human finger to be inserted into the opening. For example, the container can be one whose inner diameter (inner diameter of the opening or maximum inner diameter) is equivalent to or greater than the distance from the opening position to the bottom surface in the vertical direction. The inner diameter of the container 100 (i.e., the diameter of the opening 17 of the inner container 10) can be about 30 to 100 mm. Thus, in the present embodiment, the container 100 is suitable for use in containing contents that are to be used by being picked up with a finger. The contents to be contained are preferably, for example, contents in a form having a viscosity high to a certain extent, such as a paste, a gel, a mousse, and the like, and specifically, can be a cosmetic such as a facial cleanser, a facial wash, a beauty cream, a moisturizing cream, a hair treatment agent in a paste form, a hair styling agent, a body care agent, and the like, and a sanitary commodity.

[0031] The inner container 10 is a replaceable component (replacement container). On the other hand, the outer container 20 can be a component that continues to be used even if the inner container 10 is replaced, and on the outer surface of the outer container 20, information or decoration, or the like, regarding the raw material of the contents, the method of use, and the like, can be applied.

[0032] The inner container 10 can be a bottomed cylindrical shape as described above, or can have a bottom portion 11 and a cylindrical portion 12 connected to the bottom portion 11. The inner diameter and / or the outer diameter of the cylindrical portion 12 can be fixed in the vertical direction, but can also vary, for example, can be smaller or larger the closer to the opening 17 (the closer to the upper side). As shown in FIG. 1, the inner container 10 can have a stepped portion 12c in which the inner diameter of the cylindrical portion 12 is larger than the inner diameter of the bottom portion 11. Figure 3 and Figure 4 As shown, the connecting portion of the bottom portion 11 and the cylindrical portion 12 can be a curved surface.

[0033] The cylindrical portion 12 of the inner container 10 has a peripheral wall portion 12a that constitutes a main portion of the cylindrical portion 12 and that is in contact with the contents, and a ring-shaped overhang portion 12b that is formed on the radially outer side of the peripheral wall portion 12a and that overhangs in the circumferential direction from the upper edge 12t of the cylindrical portion 12. In other words, the cylindrical portion 12 is folded back to the outer side as a whole on the upper side, and the folded-back portion thereof is the ring-shaped overhang portion 12b. The length (height) of the ring-shaped overhang portion 12b in the axial direction is preferably fixed, and the length thereof can be 5 to 30 mm. The peripheral wall portion 12a and the ring-shaped overhang portion 12b of the inner container 10 are separated in the radial direction, and a gap or a pocket that opens downward (indicated by the arrow in FIG. 1) is formed therebetween. Figure 4

[0034] The outer container 20 can also be a substantially cylindrical shape with a bottom, or can have a bottom portion 21 and a cylindrical portion 22 connected to the bottom portion 21. In addition, the outer container 20 can also be a structure without the bottom portion 21 as long as it is capable of supporting the inner container 10. In this case, when the double container 1 in a state in which the inner container 10 is mounted on the outer container 20 is viewed from below, the inner container 10 can be exposed.

[0035] ​The diameter of the cylindrical portion 22 of the outer container 20 can be fixed or varied along the vertical direction. In the illustrated example, the cylindrical portion 22 has a cylindrical body 22a and an upper peripheral wall portion 23 that forms the upper part relative to the cylindrical body 22a. Figures 2 to 4 The upper peripheral wall portion 23 is smaller in both inner and outer diameters than the cylindrical main body 22a, and a stepped portion is formed at the transition between the upper peripheral wall portion 23 and the cylindrical main body 22a. With the inner container 10 and outer container 20 installed, the upper peripheral wall portion 23 of the outer container 20 is positioned within the gap between the aforementioned peripheral wall portion 12a and the annular hanging portion 12b formed in the inner container 10, and the outer peripheral surface of the upper peripheral wall portion 23 faces the inner peripheral surface of the annular hanging portion 12b. Figure 4 (More details to follow).

[0036] A lid 40 can also be installed on the double container 1, where the inner container 10 is mounted on the outer container 20. Figure 1 , Figure 2 and Figure 4 This allows the opening 17 of the inner container 10 to be closed, protecting the contents from the external environment. Figure 1 In the example shown, the inner container 10 is not exposed when the lid 40 is installed. Therefore, by making the lid 40 and the outer container 20 the same in appearance (including material, color, pattern, etc.) or opposite to highlight the differences, a highly designed and aesthetically pleasing structure can be obtained. In addition, a sealing gasket or the like can be provided on the inside of the lid 40 to seal the container 100 more tightly. The lid 40 is formed by screwing into the external thread 18m formed on the outer peripheral surface of the annular hanging portion 12b of the inner container 10. However, the lid 40 can also be installed on the double container 1 by means other than screwing, such as vertical fitting.

[0037] In this embodiment, the inner container 10 is screwed onto the outer container 20. In other words, the inner circumferential surface of the annular hanging portion 12b of the inner container 10 and the outer circumferential surface of the outer container 20 are engaged by a threaded connection. Specifically, the internal thread portion 18f formed on the inner circumferential surface of the annular hanging portion 12b of the inner container 10 is screwed onto the external thread portion 28m formed on the upper peripheral wall portion 23 of the outer container 20.

[0038] In the case of mounting the inner container 10 on the outer container 20, first, the axis AL of the inner container 10 and the axis AL of the outer container 20 are aligned and brought close in the up-down direction. Thereby, the upper peripheral wall portion 23 of the outer container 20 can be inserted into the gap between the peripheral wall portion 12a and the annular downward portion 12b of the inner container 10. Further, when the inner screw thread portion 18f formed on the inner peripheral surface of the annular downward portion 12b of the inner container 10 and the outer screw thread portion 28m formed on the outer peripheral surface of the upper peripheral wall portion 23 of the outer container 20 abut in the up-down direction, the inner container 10 is relatively rotated with respect to the outer container 20. In the illustrated example, by relatively rotating the inner container 10 with respect to the outer container 20 in the clockwise direction as viewed from above, the two can be screwed (screwed and coupled). The inner screw thread portion 18f of the inner container 10 and the outer screw thread portion 28m of the outer container 20 can also be configured such that the screwing of the two is performed until the upper peripheral wall portion 23 of the outer container 20 abuts on the surface of the upper edge 12t of the cylindrical portion 12 of the inner container 10 on the lower side. In addition, the direction of the relative rotation for establishing the screwing of the inner container 10 and the outer container 20 is not limited to the clockwise direction, and can be the counterclockwise direction.

[0039] Since the inner container 10 and the outer container 20 are screwed (screwed and coupled), in order to mount the inner container 10 on the outer container 20, it is sufficient to rotate along the screw thread, and thus the mounting operation can be reliably performed by the guidance of the screw thread. In addition, when the inner container 10 is temporarily mounted on the outer container 20, since the inner container 10 and the outer container 20 are engaged in the entire circumferential direction, the two are reliably fixed in the up-down direction, and the possibility of the separation of the two in the up-down direction against the user's intention can be reduced.

[0040] Furthermore, conventionally, the parts used to form the engagement (e.g., interlocking engagement) require meticulous dimensional structures; for example, the engagement parts must sometimes be meticulously formed in the vertical, radial, and circumferential directions. Therefore, when using relatively fragile materials, the engagement parts are sometimes easily damaged during manufacturing, or wear occurs during use, preventing the desired engagement from being achieved. Moreover, depending on the material, for example, in materials with low elasticity or viscoelasticity, if the dimensions of the engagement parts are uneven, this unevenness is directly reflected in uneven engagement forces, sometimes resulting in an unsuitable engagement. For example, there may be situations where the engagement is too tight, making it impossible for the user to operate, or conversely, the engagement is too loose, causing the inner container to wobble during use. In contrast, according to this embodiment, the inner container 10 and the outer container 20 are installed by screwing, thereby achieving a suitable engagement regardless of the material, expanding the range of materials that can be used for the container, especially for the outer container 20. Therefore, considering design and aesthetics, for example, even if the outer container 20 is made of glass, ceramic, or the like, a secure engagement between the inner container 10 and the outer container 20 can be achieved. Therefore, even if the outer container 20 is reused, the inner container 10 can be replaced smoothly, and the inner container 10 and the outer container 20 can be prevented from separating from each other without the user's intention.

[0041] Furthermore, in this embodiment, a locking tab 15 capable of engaging with the outer container 20 is formed on the cylindrical portion 12 of the inner container 10, more specifically on the annular hanging portion 12b. Figures 2 to 4 ).like Figures 2 to 4 As shown, the locking tab 15 can be a component partially cut from the annular droop 12b, capable of movement at least in the radial direction. In the illustrated example, the locking tab 15 is integrally formed with the inner container 10, but the locking tab 15 can also be separate from the inner container 10. Furthermore, "capable of radial displacement" means that part or all of the locking tab 15 can be radially displaced, which can include radial movement of a portion of the locking tab 15 by deforming it, or radial movement of the entire locking tab 15. In the illustrated example, the locking tab 15 is a cantilevered spring component having a fixed end 15a connected to the cylindrical portion 12 (more specifically, the annular droop 12b) of the inner container 10, and a free end 15b separated from the cylindrical portion 12 (more specifically, the annular droop 12b). Figure 3 The entire locking piece 15 can elastically deform with the fixed end 15a as its base. Furthermore, the extension direction from the fixed end 15a to the free end 15b of the locking piece 15 is circumferential. Then, the locking piece 15 can open radially outward about the fixed end 15a as its axis. The length of the locking piece 15, that is, the length from the fixed end 15a to the free end 15b, can be 5 to 15 mm.

[0042] Next, also refer to Figure 5A ,Figure 5B as well as Figure 6 The function of the locking piece 15 is explained. Figure 5A , Figure 5B as well as Figure 6 All cross-sectional views are obtained by cutting along a direction orthogonal to the axis of container 100 (horizontal direction) at a position including the locking piece 15. Figure 4 (Corresponding to the II-II line section). However, Figure 5A and Figure 5B This indicates the state without the cover (40). Figure 6 This indicates that the cover 40 has been installed.

[0043] like Figure 5A As shown, the locking tab 15 is connected to the annular hanging portion 12b of the inner container 10 in the circumferential direction via the fixed end 15a. Alternatively, a protrusion 15c protruding radially inward may be formed on the free end 15b located on the opposite side of the fixed end 15a in the circumferential direction. Due to the presence of the protrusion 15c, the area of ​​the end face of the free end 15b increases. On the other hand, a convex portion 23p protruding radially outward is formed on the outer circumferential surface of the upper peripheral wall portion 23 of the outer container 20. The protrusion 15c of the locking tab 15 overlaps with the convex portion 23p formed on the outer circumferential surface of the outer container 20 when viewed radially. Therefore, when the inner container 10 is rotated relative to the outer container 20, the end face of the free end 15b of the locking tab 15 abuts against the convex portion 23p in the circumferential direction. Figure 5A However, as described above, the locking tab 15 is capable of radial displacement, and in particular, in the illustrated example, it is capable of elastic deformation radially outward. Therefore, regardless of whether it is rotated in the direction of arrow A1 (the direction of mounting the inner container 10 onto the outer container 20) or in the direction of arrow A2 (the direction of removing the inner container 10 from the outer container 20), the locking tab 15 is capable of opening outward in the radial direction (the direction of arrow A3) and passing over the protrusion 23p.

[0044] Figure 5B From Figure 5A The diagram shows a state where the inner container 10 is rotated further in the direction of arrow A2, that is, in the direction that the inner container 10 is disengaged from the outer container 20, thus removing the inner container 10 from the outer container 20. (See diagram for reference.) Figure 5B As shown, the locking tab 15 undergoes elastic deformation and opens radially outward, positioned further radially outward than the protrusion 23p of the outer container 20. Furthermore, if from... Figure 5B The state further causes the inner container 10 to rotate in the direction of arrow A2, so that the protrusion 15c of the locking piece 15 can pass over the protrusion 23p. Thus, in Figure 5A and Figure 5BIn the state (without the cover 40 installed), the inner container 10 and the outer container 20 can rotate relative to each other. Therefore, when the inner container 10 needs to be replaced, the user can remove the inner container 10 by holding the inner container 10, for example, the annular hanging part 12b, and rotating it relative to the outer container 20.

[0045] In contrast, Figure 5A and Figure 5B When the cover 40 is further installed in the state shown, the action of the locking piece 15 is different. For example... Figure 1 and Figure 4 As shown, the cover 40 covers the outer peripheral surface of the annular hanging portion 12b of the inner container 10. More specifically, the internal thread 48f formed on the inner peripheral surface of the cover 40 engages with the external thread 18m formed on the outer peripheral surface of the annular hanging portion 12b. Figure 4 The cover 40 covers the annular hanging portion 12b in a manner that covers the locking tab 15, and is radially opposite to the locking tab 15. Figure 6 In the cross-section shown, the cover 40 is positioned radially outward of the locking tab 15. Therefore, when the locking tab 15 is to be displaced radially outward (in the direction of arrow A3), the displacement of the locking tab 15 is blocked by the cover 40. Due to this limitation on radial displacement (deformation), the protrusion 15c of the locking tab 15 cannot pass over the protrusion 23p formed on the outer peripheral surface of the outer container 20 in the circumferential direction. Therefore, when the inner container 10 is rotated relative to the outer container 20 in the direction of loosening the screw thread between the inner container 10 and the outer container 20, i.e., in the direction of removing the inner container 10 from the outer container 20 (in the direction of arrow A2), the free end 15b of the locking tab 15 abuts against the protrusion 23p in the circumferential direction. Moreover, by limiting further rotation of the inner container 10 in the direction of arrow A2 from this abutting state, the screw thread between the inner container 10 and the outer container 20 can be prevented from loosening. In this way, the locking tab 15 of this type provided on the inner container 10 can lock the outer container 20 in the circumferential direction.

[0046] The restriction of the relative rotation of the cap 40 as described above means that the inner container 10 and the outer container 20 cannot be detached in the state where the cap 40 is attached. In the conventional mode where the engagement of the locking piece 15 and the protrusion 23p is not present, the inner container 10 is detached from the outer container 20 even in the state where the cap 40 is attached, and therefore, in the case where the cap 40 and the inner container 10 are firmly screwed, the phenomenon that the cap 40 and the inner container 10 relatively rotate with respect to the outer container 20 (also referred to as co-rotation) occurs. Originally, the user needs to detach only the cap 40 to expose the inner container 10 at the time of use, but if the cap 40 and the inner container 10 are integrated and detached from the outer container 20, the opening 17 of the container 100 is not exposed, and therefore the user cannot reach the contents. Therefore, the trouble of detaching the cap 40 from the inner container 10 and attaching the inner container 10 to the outer container 20 again occurs, which is inconvenient. In contrast, according to the present embodiment, the rotation of the inner container 10 with respect to the outer container 20 is restricted in the state where the cap 40 is attached, and therefore the co-rotation as described above does not occur, and the user can detach only the cap 40 to use the contents without special effort.

[0047] In addition, as shown in Figs. 1 and 2, the locking piece 15 is disposed outside the range where the outer thread portion 18m is formed in the annular downward portion 12b in the upward-downward direction, and more specifically, is disposed on the lower side of the range where the outer thread portion 18m is formed. Thus, the locking piece 15 can be formed without overlapping the thread, and therefore the design becomes simpler. Further, it is preferable that the locking piece 15 be disposed lower than the range where the inner thread portion 18f is formed in the annular downward portion 12b. Figure 3 Figure 4 In addition, as shown in Figs. 1 and 2, the locking piece 15 is disposed outside the range where the outer thread portion 18m is formed in the annular downward portion 12b in the upward-downward direction, and more specifically, is disposed on the lower side of the range where the outer thread portion 18m is formed. Thus, the locking piece 15 can be formed without overlapping the thread, and therefore the design becomes simpler. Further, it is preferable that the locking piece 15 be disposed lower than the range where the inner thread portion 18f is formed in the annular downward portion 12b.

[0048] The materials of the inner container 10 and the outer container 20 are not particularly limited. The materials can be resins, or can be formed of other materials that are more fragile than resins, such as glass, pottery, porcelain, and the like. Alternatively, the materials can be metals and the like. However, if at least the locking piece 15 is formed of a resin, radial elastic deformation can be performed, and therefore it is preferable. In addition, the annular downward portion 12b, and preferably the entire inner container 10, is preferably formed of the same resin as the locking piece 15, and the inner container 10 including the locking piece 15 is preferably integrally formed of the same resin. As specific examples of the resin, for example, polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polystyrene (PS), polylactic acid (PLA), and the like can be given, and polypropylene (PP) is preferable. In addition, a resin can be used as the material of the outer container 20, but since glass is strong and can give an impression of high quality, glass can be used. In the present embodiment, even in the case where the outer container 20 is formed of glass, a structure in which damage is less likely to occur and the inner container 10 and the outer container 20 can be appropriately engaged and disengaged can be obtained.​

[0049] Figure 7 The above content container 10 is used as a refill container 120. The refill container 120 is provided with the content container 10 and the temporary lid 30. When the content container 10 is replaced, the user can install the refill container 120 on the outer container 20 in a state where the temporary lid 30 is provided, and then remove the temporary lid 30. Thus, it is possible to prevent the contents from overflowing during installation of the content container 10 on the outer container 20. The temporary lid 30 can be an aluminum film (aluminum seal) or the like that seals the content container 20 in a manner that can be peeled off and attached to the upper edge 12t of the content container 10.

[0050] <2nd Embodiment>

[0051] Figure 8 The state in which the lid of the container 200 based on the 2nd embodiment is removed, i.e., the combination of the content container and the outer container (double container) 201 is shown. The container 200 based on the 2nd embodiment has the same basic structure as the above container 100 based on the 1st embodiment. Figures 1 to 6 ), i.e., a replaceable bottomed cylindrical content container 210, an outer container 220 that houses the content container 210, and a lid (not shown), and the content container 210 is installed on the outer container 220 by screwing. The content container 210 has a bottom and a cylindrical portion 212. The cylindrical portion 212 has a peripheral wall portion 212a and a ring-shaped overhang portion 212b that overhangs from the upper edge 212t on the outside of the peripheral wall portion 212a, and a locking piece 215 is formed in the ring-shaped overhang portion 212b. In addition, the outer container 220 has a bottom 221 and a cylindrical portion 222. The upper peripheral wall portion 223 of the cylindrical portion 222 is disposed in the gap between the peripheral wall portion 212a and the ring-shaped overhang portion 212b of the content container 210. The content container 210 and the outer container 220 are engaged by screwing the inner thread portion of the ring-shaped overhang portion 212b of the content container 210 and the outer thread portion 223m of the upper peripheral wall portion 223 of the outer container 220. However, in the 2nd embodiment, the structure of the locking piece 215 and its surroundings is different.

[0052] The locking piece 215 is different from the locking piece 15 in the 1st embodiment and is formed in the range in the vertical direction in which the outer thread portion 18m is formed on the ring-shaped overhang portion 212b of the content container 210. Therefore, the outer thread portion 218m (thread portion formed on the outer peripheral surface of the ring-shaped overhang portion 212b) of the content container 210 is discontinuous at the middle in the circumferential direction, and the locking piece 215 is formed in the discontinuous portion. In this way, by forming the locking piece 215 in the range in which the outer thread portion 218m is formed on the content container 210, it is possible to shorten the vertical length of the ring-shaped overhang portion 212b. Therefore, it is possible to increase the range of choices in design, and it is also possible to save the material of the content container 10.

[0053] The locking piece 215 is also the same as the locking piece 15 in the second embodiment. Figures 2 to 6 Similarly, it is a component cut from the annular drooping portion 212b that can be displaced radially. The locking piece 215 can also be a cantilevered spring component having a fixed end 215a connected to the inner container 210 (annular drooping portion 212b) and a free end 215b separated from the inner container 210. The extending direction of the locking piece 215, that is, the extending direction from the fixed end 215a to the free end 215b, is circumferential.

[0054] Furthermore, in this embodiment, the radial thickness of the locking piece 215 increases from the fixed end 215a toward the free end 215b. Additionally, the locking piece 215 is not flush with the outer peripheral surface of the annular drooping portion 212b on the fixed end 215a side, but is located radially inward. Due to this shape of the locking piece 215, elastic deformation based on the fixed end 215a is easier.

[0055] Figure 9 It is a cross section cut from the container 200 based on the second embodiment along a plane orthogonal to the axial direction at the position containing the locking piece 215. Figure 9 This is in accordance with the description of the first embodiment. Figure 5A , Figure 5B as well as Figure 6 The corresponding diagram. (For example...) Figure 9 As shown, the locking piece 215 has a protrusion 215c protruding radially inward on one side of the free end 215b, thereby increasing the area of ​​the end face of the free end 215b. On the other hand, an external thread portion 228m is formed on the outer peripheral surface of the upper peripheral wall portion 223 of the outer container 220, but there is a discontinuous portion 229 in the thread teeth of the external thread portion 228m. Figure 9 In the state shown, the protrusion 215c is embedded in the discontinuous portion 229 of the thread of the external thread 228m, and the locking piece 215 is in a state where no force is applied.

[0056] As described above, the locking piece 215 is capable of radial displacement, and more specifically, radial elastic deformation, thus... Figure 9 When rotated in either the direction of arrow A1 (the direction in which the inner container 210 is mounted on the outer container 220) or the direction of arrow A2 (the direction in which the inner container 210 is removed from the outer container 220), the locking piece 215 can open radially outward (in the direction of arrow A3) and move outward of the thread teeth of the external thread portion 228m of the outer container 220. In particular, when the inner container 210 is rotated relative to the outer container 220 in the direction of arrow A2 in order to remove the inner container 210 from the outer container 220, the protrusion 215c of the locking piece 215 can pass over a portion (protrusion 223p) of the external thread portion 228m.

[0057] On the contrary, in Figure 9 , the position of the lid 240 when the lid 240 is installed is indicated by a single-dot chain line. When the lid 240 is installed, the lid 240 is positioned at the radially outer side of the locking piece 215, and the movement of the radially outer side of the locking piece 215 is suppressed. Therefore, in the case where the relative rotation in the direction of the arrow A2 is performed, the end surface of the free end 215b of the locking piece 215 comes into abutment with a portion (a convex portion 223p) of the thread of the outer thread portion 228m in the circumferential direction, and no further relative rotation is caused. Thus, in the state where the lid 240 is installed, the relative rotation in the direction of the detachment of the inner container 210 from the outer container 220 (the rotation in the direction of the arrow A2) is restricted, that is, the state where the outer container 220 is locked in the circumferential direction by the locking piece 215 of the inner container 210 is established, and thus the detachment of the inner container 210 from the outer container 220 is not caused. As in the first embodiment, in the case where the lid 240 is to be detached, the rotation of the inner container 210 with respect to the outer container 220 is prevented, and thus the so-called co-rotation in which not only the lid 240 but also the inner container 210 are detached together is prevented.

[0058] Although, in the illustrated example, the portion (the convex portion 223p) in which the free end 215b of the locking piece 215 comes into abutment in the circumferential direction is a portion of the outer thread portion 228m of the outer container 220, the convex portion 223p having the same function as the 23p described in the first embodiment can not necessarily be a portion of the outer thread portion 228m. As long as the free end 215b of the locking piece 215 comes into abutment in the circumferential direction, the convex portion 223p can be a portion formed in a position, shape, and size that is separated from the thread of the outer thread portion 228.

[0059] In the present embodiment, as shown in Figure 8 and Figure 9 , the locking piece 215 can also overlap the thread of the outer thread portion 223m of the upper circumferential wall portion 223 of the outer container 220 in the vertical direction. In this case, a groove along the circumferential direction can also be formed on the inner circumferential surface side of the locking piece 215 in a portion other than the protrusion 215c.

[0060] In addition, in the present embodiment, the opening 216 is formed in the annular downward portion 212b of the inner container 210. It can be said that the locking piece 215 is formed in the rim portion of the end portion in the circumferential direction of the opening 216. The opening 216 can extend in the circumferential direction in a range of 1.5 times or more the circumferential length of the locking piece 215. Figure 8 Such an opening 216 is preferable in consideration of the smooth screwing of the inner container 210 and the outer container 220 or the manufacturing in the case of injection molding, a casting mold, or the like.

[0061] <3rd Embodiment>

[0062] Figure 10 A container 300, i.e., a combination of an inner container and an outer container (double container) 301, in a state where the lid is detached, based on the third embodiment is shown. The container 300 according to the third embodiment has the same basic structure as the container 100 (see FIG. 1) based on the first embodiment and the container 200 (see FIG. 2) according to the second embodiment. That is, it has a replaceable bottomed cylindrical inner container 310, an outer container 320 that houses the inner container 310, and a lid (not shown), and the inner container 310 is attached to the outer container 320 by screwing. The inner container 310 has a bottom and a cylindrical portion 312. The cylindrical portion 312 has a peripheral wall portion 312a and an annular downward portion 312b that is downward from an upper edge 312t on the outside of the peripheral wall portion 312a, and a locking piece 315 is formed in the annular downward portion 312b. In addition, the outer container 320 has a bottom 321 and a cylindrical portion 322. The upper peripheral wall portion 323 of the cylindrical portion 322 is disposed in the gap between the peripheral wall portion 312a and the annular downward portion 312b of the inner container 310. The inner container 310 and the outer container 320 are engaged by screwing the inner thread portion of the annular downward portion 312b of the inner container 310 and the outer thread portion 328m of the upper peripheral wall portion 323 of the outer container 320. Figures 1 to 6 Figure 8 Figure 9

[0063] The function of the locking piece 315 in the third embodiment is the same as that of the locking piece 215 in the second embodiment, and the locking piece 215 also locks the outer container 320 in the peripheral direction. However, in the third embodiment, unlike the second embodiment, no outer thread portion is formed on the annular downward portion 312b of the inner container 310. That is, in the present embodiment, the lid (not shown) is not screwed with the inner container 310, but is screwed with the outer container 320. Therefore, it is more preferable from the aspect that the phenomenon of co-rotation that can occur when the lid is firmly combined with the inner container 310 as explained in the first and second embodiments is less likely to occur.

[0064] The present application has been described above with reference to specific embodiments based on the drawings, but these embodiments are merely presented as examples, and the present application is not limited by the above-described embodiments. Various changes, modifications, substitutions, deletions, additions, combinations, and the like can be made within the scope of the present disclosure.

[0065] This application claims priority based on Japanese Patent Application No. 2021-126100 filed on July 30, 2021, and incorporates it in its entirety.

[0066] [Explanation of symbols]

[0067] 1, 201, 301 Double container (container)

[0068] ​​​10, 210, 310 inner container

[0069] 11, 211, 311 bottom

[0070] 12, 212, 312 cylindrical portion

[0071] 12a, 212a, 312a peripheral wall portion of the cylindrical portion

[0072] 12b, 212b, 312b annular downward portion of the cylindrical portion

[0073] 12t, 212t, 312t upper edge of the cylindrical portion

[0074] 15, 215, 315 locking piece

[0075] 15a, 215a, 315a fixed end of the locking piece

[0076] 15b, 215b, 315b free end of the locking piece

[0077] 15c, 215c protrusion of the locking piece

[0078] 18f inner threaded portion of the inner container

[0079] 18m, 218m outer threaded portion of the inner container

[0080] 20, 220, 320 outer container

[0081] 22, 222, 322 cylindrical portion of the outer container

[0082] 22a, 222a, 322a main body of the cylindrical portion of the outer container

[0083] 23, 223, 323 upper peripheral wall portion of the outer container

[0084] 23p, 223p, 323p convex portion

[0085] 30 temporary lid

[0086] 40, 240 lid

[0087] 100, 200, 300 container

Claims

1. A container provided with a replaceable bottomed tubular inner container, an outer container that houses the inner container, and a lid, wherein the inner container is attached to the outer container by screwing, a locking piece that locks the outer container in the circumferential direction is provided to a tubular portion of the inner container, in a state in which the lid is attached to the inner container, movement of the locking piece in the radial direction is suppressed by the lid, the tubular portion has a peripheral wall portion and an annular overhang portion that overhangs from an upper end of the tubular portion on the outside of the peripheral wall portion, in a state in which the inner container is housed in the outer container, the annular overhang portion is disposed opposite the outer peripheral surface of the outer container, and the locking piece is formed in the annular overhang portion.

2. The container according to claim 1, wherein the lid is attached to the inner container and / or the outer container by screwing.

3. The container according to claim 1, wherein the locking piece is capable of displacement in the radial direction.

4. The container according to claim 3, wherein the locking piece is a cantilever spring member that has a fixed end connected to the inner container and a free end separated from the inner container, and the direction of extension from the fixed end to the free end is the circumferential direction.

5. The container according to claim 4, wherein the outer peripheral surface of the outer container is formed with a convex portion, and the free end of the locking piece abuts against the convex portion in the circumferential direction, thereby restricting rotation of the inner container relative to the outer container.

6. The container according to claim 5, wherein the locking piece is formed in a range in which an outer screw thread portion is formed in the annular overhang portion, as viewed in the axial direction.

7. The container according to claim 5, wherein the locking piece is formed outside a range in which an outer screw thread portion is formed in the annular overhang portion of the inner container, as viewed in the axial direction of the tubular portion.

8. The container according to claim 5, wherein no outer screw thread portion is formed in the outer peripheral surface of the annular overhang portion of the inner container, and the lid is screwed to the outer container.

9. A refill container provided with a bottomed tubular inner container that is attachable to an outer container by screwing, and a temporary lid that seals the inner container, wherein a locking piece that locks the outer container in the circumferential direction in a state in which the inner container is attached to the outer container is provided to a tubular portion of the inner container, and movement of the locking piece in the radial direction is restricted by the lid when the lid is attached to the inner container, the tubular portion has a peripheral wall portion and an annular overhang portion that overhangs from an upper end of the tubular portion on the outside of the peripheral wall portion, in a state in which the inner container is housed in the outer container, the annular overhang portion is disposed opposite the outer peripheral surface of the outer container, and the locking piece is formed in the annular overhang portion. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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